The investment seeks investment results that correspond generally, before fees and expenses, to the performance of its underlying index, the Janus Small Cap Growth Alpha Index. The fund pursues its investment objective by normally investing at least 80% of its net assets in the securities that comprise the underlying index. The underlying index is composed of common stocks of small-sized companies that are included in the Solactive Small Cap Index, a universe of 2,000 small-sized capitalization stocks.